Why Bonding Strength Matters for Polymer Coatings (and NOT for EonCoat)

Polymer Coating Bonding Process

When choosing a traditional polymer corrosion-resistance coating, it’s important to consider pull-off strength, or how much force is required to separate the polymer from the substrate. This is important because the source of a polymer’s corrosion resistance is how tightly it can bond with the substrate (which is also why extensive preparation is required before applying a polymer coating). If one section of a polymer coating is pulled off, the entire substrate could be at risk.

EonCoat Bonding Process

EonCoat is a ceramic and works a bit differently than a polymer corrosion-resistance coating. When applied, EonCoat creates a 20 micron alloyed layer chemically linking EonCoat to the substrate. This alloyed layer that provides the corrosion proof surface cannot come off in a typical pull off test because it has become part of the substrate. The ceramic layer of EonCoat which protects the alloyed layer will separate mid coating in a pull off test, but this layer is not the primary corrosion barrier. So adhesion tests are not the measure of corrosion protection that they are with polymer coatings.

Learn more about EonCoat.